Cisco Technology, Inc.

Gregory Dupree

Marco De Angeli

Roberto Gianella

Thomas A Hamilton

Marco Portinari

Loc Thi Xuan Dang

Steven Lowe

A printed circuit board (PCB) may be used in a first mode where boundary scan techniques are used to externally program and/or test devices on the PCB, or a second mode where an internal source programs devices using boundary scan techniques. In one implementation, there is also additional flexibility to include or skip devices in a boundary scan chain and to accommodate non-scan related functions for pins used for scanning. These various modes of operation may be selected by activating and deactivating buffers.

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Petaluma, CA, United States of America

Gregory Dupree